Dyadic product
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In mathematics, in particular multilinear algebra, the dyadic product
of a column vector 
and a row vector 
is the tensor product of the vectors. The result is a tensor of rank two (a matrix). It is a special case of the tensor product or Kronecker product, for vectors of the same dimension.
[edit] Example
[edit] Definition
Using Einstein's summation convention, the dyadic product
may be defined by
.
Writing out the sums, this becomes
.
